MUMBAI METRO LINE 3
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NO. OF MOULDS AVAILABLE: 16 sets (16 × 6 segments = 96 moulds) STACKING CAPACITY: 752 rings
The segment has to be designed for 4hr fire rating as per IS:456 The stiffness of the permanent lining should be such that the deflections are within permissible limits as per BS: 8110-part1 and IS:456. TYPE OF REINFORCEMENT USED: Fe 500 GRADE OF CONCRETE: M50 The design of the segments shall be adequate for all stresses induced during stacking, lifting, transport, erection jacking and impact, including in-service stress & impact. (2) The design shall consider in-situ ground stresses and shall provide evidence and/or measurements in support of the parameters adopted in the design as part of the calculations. The ground load on the tunnel shall be based on the actual height of overburden above the tunnel lining. (3) The design of the bored tunnel linings shall take into account the proximity of the bored tunnels one to another, the sequence and timing of construction and the proximity of adjacent EBS. (4) The design shall also consider the relative rates of loading / unloading due to TBM jacking force in both the lateral and vertical directions, and the resultant induced The design for segment lining shall address aspects including the following, as appropriate a) Ring configurations, b) Segment size and form, c) Fixing details including for: ring to ring fixings; segment to segment fixings; fixings for all equipment to be installed handling, stacking and installation of segments; holes, recesses and fixtures for other system components. d) tolerances in production and installation of segments shall be accounted in the design. e) Installation of Other components, such as: grout hole valves; gaskets; bedding and packing materials. f) Cavity grout, between lining and ground. g) Instrumentation and monitoring to demonstrate performance of the installed linings. h) Short-term {during constructionintermediate (immediately after construction) and long-term (full design life) loading conditions. i) Stresses induced by grouting and ground pre-treatment, where applicable.
Unit of measurement (BOQ),
UNITS
Unit of measurement in supply
UNITS
Approved make list
-
Lead time for procurement
5-7 days
SUBMITTED BY: BHUMIKA RAJ UC5316
150
